278053339931 has 2 divisors, whose sum is σ = 278053339932. Its totient is φ = 278053339930.

The previous prime is 278053339919. The next prime is 278053339933. The reversal of 278053339931 is 139933350872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278053339931 - 2¹⁰ = 278053338907 is a prime.

It is a super-2 number, since 2×278053339931² (a number of 24 digits) contains 22 as substring.

Together with 278053339933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (278053339933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139026669965 + 139026669966.

It is an arithmetic number, because the mean of its divisors is an integer number (139026669966).

Almost surely, 2^278053339931 is an apocalyptic number.

278053339931 is a deficient number, since it is larger than the sum of its proper divisors (1).

278053339931 is an equidigital number, since it uses as much as digits as its factorization.

278053339931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 278053339931 in words is "two hundred seventy-eight billion, fifty-three million, three hundred thirty-nine thousand, nine hundred thirty-one".